Sanding, scouring, and buffing machine



April 10, 1928.

L. L. HARTWELL SANDING AND BUFFING MACHINE SCOURING,

Filed June '7, 1927 2 Sheets-Sheet 1 PATENT OFFICE.

LESLIE L. HARTWELL, OF WINCHESTER, MASSACHUSETTS.

SANDING, SCOURING, AND BUFFING MACHINE.

Application filed June 7,

My present invention is a novel and improved sanding, scouring and butting machine. particularly adapted for operating upon assembled heels and heel bases, of the general type illustrated and described in my prior and copending applications Ser. No. 193,492, tiled May 23d, 1927, and Ser. No. 155,419, filed December 17, 1926.

In application Ser. No. 155,419 I have illustrated and described a method of assembling these combined rubber heels and heel bases, and in application Ser. No. 193,- 492 I have illustrated and described, in detail, a preferred machine for carrying out such method of manufacture, and assembling the rubber heels with their respective heel bases. 9

In prior methods of shoe manufacture, it has been usual to first fit, apply and attach a heel base to a shoe, and thereupon fit, position and attach a rubber heel to the heel base after the heel base has been attached. Such prior methods, aside from requiring skill in attaching and fitting, require repeated and continuous handling and operations frequently resulting in the disalining of the rubber heel from the heel base. However, a most serious difliculty was experienced in butting, trimming, scouring. or otherwise treating the heel breast, not only of the rubber heel, but also of the heel base, which was necessary when the heel base was applied first and the rubber heel applied subsequently. Particular ditticulty in carrying out these heel breast trimming operations was experienced in deep arched shoes, or where the heel breastwas inclined, because of the difficult of handling and coordinating both the s 0e and the machine in order to get into the sharp angle thus formed at the junction of the shank and heel breast. These operations necessarily added greatly to the expense and cost of shoe manufacture.

Also. an important object of the present invention. therefore, is the provision of means to successfully, neatly, quickly, and efficiently sand, scour, bufl' or finish the heel breast of assembled rubber heels and bases.

1927. Serial No. 197,217.

'In carrying out my present invention, I

utilize a rotating or revolving sanding or bufling member, and provide, in close relation with said butting member a vertically reciprocable and tiltable work supporting table. In this manner, I can vary the angle of the table to coincide with the angle of the heel breast to be operated upon, or to coincide with the angle of the side or rear of the assembled heel to be operated upon.

My present machine is economical to manufacture, simple and rapid in operation, and is efficient to a high degree.

I believe that my present machine, embodying the features above briefi outlined, is novel, and I have therefore cl aimed the same broadly herein.

' Further features of combinations of parts, and advantages, will be hereinafter more fully pointed out and claimed.

Referring to the drawings, illustrating a preferred embodiment of the present invention,

Fig. 1 is a side elevation of the complete machine Fig. 2 is a cross sectional view on the line 22 of Fig. 1;

Fig. 3 is a cross sectional View on the line 33 of Fig. 1;

Fig. 4 is a vertical section on the line 4-4 of Fig. 1;

Fig. 5 is a cross sectional detail on the line 55 of Fig. 2;

Fig. 6 is a cross sectional perspective of ar. assembled heel base and rubber heel before breast trimming; and

Fig. 7 is a cross sectional perspective of such an assembled heel and base after the heel breasttrimming operation.

As shown in the drawings, my present novel machine comprises a base or supporting plate 1, ada ted to be secured to a table, bench, or the li e, through the bolt holes 2, 2. This plate 1 has a beariing boss 3 in which is inserted and supported a shaft, column, or standard 4, secured in said bearing against rotation by a set screw 5. Affixed to the top of the shaft 4 is a. bearing bracket 6 securel held in position by a set screw 7. This caring bracket 6 has an outwardly extending arm 8, on the outer end of which is a bearing 9. A shaft 10 extends throu h the bearing 9, and has an upper threa ed end 11, on which is threaded a pair of washers 12 adapted to rotate with the the invention, details? shaft 10, the shaft 10 being freely rotatable in the bearing 9. The lower end of the shaft 10 passes through a bearing boss 13 on the base plate 1, and secured to the shaft 10 by a pin or the like 15 is a pulley 14.

When the machine is mounted on a bench or table the pulley 14 is intended to extend through and be driven from below the table or bench, by any suitable source of power, such as a belt drive or the like. Secured to the shaft 10, and adapted to rotate therewith, is my novel abrasive roll or cylinder indicated generally at 16. This cylinder com rises two half sections 17 and 18, preferab of wood, although other material may e utilized, if desired. These two half sections are hinged at 19, the hinge screws 20 penetrating into the material of the cylinder. Aflixed to the contacting faces of the half portions 17 and 18, at the sides opposite the inge 19, are several metallic plates 21, 21, secured to the cylinder by screws 22, 22. Pins 23 are held in position by one of the plates 21, and pass through suitable apertures in the op osite plates 21 when the half sections 17 an 18 are brought together. A layer of suitable material, preferably leather, 24, havin a layer or face 25 of abrasive material, S1151 as sandpa er, emery cloth, or the like, is then wrappe around the half sections, the abrasive layer having its ends 26 extending beyond the ends of the leather layer, and adapted to be pulled over, inserted between the half sections 17 and 18, and, when the half sections are closed, being gripped by the pins 23, and between the plates 21, thus forming a tight fit of the abrasive layer on the cylinder. A member 27 having 9. lug 28 is embodied in one half of the cylinder, the lug 28 projecting into the recess 29 adapted to encircle the shaft 10. In the shaft 10 is formed a recess 30, into which the lug 28 will extend when the cylinder is a plied to the shaft. Metallic half ring mem rs 31 are secured to the top and bottom of the cylinder by screws 32, each of these rings having central projecting flange portions 33 with a bevelled face 34. Surrounding the shaft 10, and threaded on the portions 35 thereof are clamping nuts or washers 36 having bevelled faces 37 adapted to cooperate with the bevelled edges 34 of the ring portions 31. Recesses 38 are provided in these nuts 36 so that the same can be tightened by a spanner wrench or the like against the rings 31, thus drawing the nuts 36 toward each other, and securely clamping the cylinder upon the shaft 10, as well as insuring ti ht clamping of the half'sections together, y drawing the ring portions 31 toward each other. This tightening action will also insure tight clamping of the ends 26 of the abrasive layer between the halves 17 and 18 of the cylinder.

Thus the cylinder 16 and its component parts will rotate with the shaft 10, with no sli page or loss of motion.

urrounding the rotating cylinder 16 is a tray or plate 39 terminating, at one end. in webs 4O afiixed to a cylindrical clamp 41., said clamp being ada ted to surround or encircle the shaft 4 ant having a pair of lugs 42. This clamp 41 is adjusted by bolt 43. which bolt would be tightened sufficiently to prevent looseness, while at the same time permitting free sliding of the clamp 41 up and down the column or shaft 4. A key 44 is inserted lengthwise of the shaft 4, and a keyway 45 is provided in the plate 39, which insures the late 39 following a straight path vertical y of the column 4.

On the base 1 is a bearing lug or boss 46, and in this bearing is one end 47, of a feed screw 48, this feed screw being threaded through a boss 49 on the clamp 41. The upper end of the feed screw passes through a boss 50 on the bearing bracket 6, and a pair of washers 51 and 52 are provided to prevent vertical movement of the feed screw 48. A handle 53 is afiixed to the upper end 54 of the feed screw 48 by means of a hub 55 sccured to the feed screw. Thus, manipulation of the handle 53 will cause rotation of the feed screw in its bearin s 46 and 50, and will cause a threading o the feed screw through the threaded boss 49 on the clamp- 41, thus efi'ecting a raising and lowering of the clamp 41, and hence of the plate 39. The key 44 will insure proper vertical alinement of the plate 39 in its travel.

Carried on the underside of the plate 39 is a block 56, the late 39 and block 56 having a slot theret rough, in which slot is fitted the su port 57 for a work holding table 58. This support is pivoted at 59, having a wide range of tilting movement toward and from the abrasive or scouring cylinder 16. When adjusted in proper tilted or level position, the support 57 is secured against urther movement by a clamp screw or wing nut 60. The table 58 carries a work guide 61 slideable along a slot 62 and clamped in adjusted position by wing nut or clamp screw 63, the end 64 of the guide 61 being engaged by a heel or the like 65 to be operated upon. The work holding table 58 is secure to its support 57 by screws or the like 66.

Thus, my machine presents the capability of producing, on the, work to be operated upon, an suitable or desirable angle or bevel desired, or of course a straight edge may be roduced by simply levelling the work tab e 58.

Also, instead of utilizing an abrasive cylinder 16, I may if desired, and it is within the scope of the present invention, utilize any suitable cutting medium, such as a rotary cutter or the like.

Figs. 6 and 7 illustrate graphically the accuse particular t i of work erformed by my resent nove machine. 11 Fig. 6 a heel use 70 has been assembled with a rubber heel 71, in any desired manner, preferably.

' jects beyond the breast of the heel base.

And, at 73, the base projects beyond the edge of the rubber heel. In order to produce a smooth, even fit, and the proper bevel or angle, between the rubber heel 71 and the base 70, the assembled unit is placed on the work table 58, against the guide 61in its adjusted position, the work table 58 is tilted and adjusted in position to produce the proper angle on the breast of the combined eel and base, and the heel and base unit is then pushed a ainst the rotating cylinder 16, the surface 0 which will rapidly produce on the breast portion of the unit, a flush,

- the clamp 41 u even, smooth finish, at the proper angle for the completed base and heel, as illustrated at 74. After bufling, scouring or sanding the breast, the remainder of the heel can be applied to the rotating cutter or sander, and the proper edge finish produced thereon. By having the plate 39 vertically reciprocable I am enabled to utilize the entire abrasive or cutting surface of the cylinder 16, thus resulting in economy of operation, enabling the cylinder 16 to be utilized until theentire abrasive or cutting surface is exhausted, whereupon the cylinder may be removed, and a new abrasive surface replaced. It will thus be a preciated that I have devised a machine 0 the kind described, one which will be eflicient in operation, simple to manipulate, and economical both to manufacture and in use. The 0 eration of my present machine will be rea ily understood, and is as follows. Y

, It being desired to buff or finish the breast of a combinedhheel and base, or a heel alone, the handle 53 is rotated, moving or down the column 4, as desired, until t e work table 58 is opposite a useful portion of the abrasive cylinder. The work table 58 is' then tilted, by loosening the wing screw 60 and manually adjusting the work table 58 to desired tilted position. Tightenin of the wing nut 60 will insure holding o the work table in adjusted osition. The guide 61 is thereupon adusted for the size of heel to be 0 erated upon, and the heel is then ushed orward against the continually rotating cylinder 25, accomplishing, in a very short space of time, the desired result of butting, trimming, or

finishing the heel breast, or other desired to be operated upon.

By. the use .0 m novel machine an operator is enabled to andle heels, or heels and bases combined, in rapid succession, it requir ing but a short time to perform the desired operation u on each heel or unit, which .of. course eliminates the necessity of further operations after the unit is applied to the shoe, the onl operation then remaining to be performed upon the heel, being the inking or other finishingvoperations.

It will thus be seen that I have devised an extremely useful and efficient machine for performing this type of work, and since I portion believe that such machine is novel, I have claimed the same broadly herein.

While I have necessarily described my in vention somewhat in detail,'it will be apprc ciated that I may vary the size, shape, and arrangement of parts, within reasonably wide limits, without departing from the spirit of the invention.

My invention is further described and defined in the form of claims as follows:

1. A machine of the kind described, comrising a base, a standard mounted on said 'ase andsecured thereto, an arm secured to the upper end of said standard, a rotatable shaft mounted in said base and said arm, an abrasive member secured to said shaft for rotation therewith, means to rotate said shaft,-a plate located adjacent to said abrasive member a clamp on said plate slideably fitted around on said clamp, and a feed screw located adjacent to said column and passing through said boss to raise or lower said plate.

2. A machine of the kind described, comprising a base, a standard mounted on said ase and secured thereto, an arm secured to the upper end of said standard, a rotatable shaft mounted in said base and said arm, an abrasive member secured to said shaft for rotation therewith, means to rotate said shaft, a plate located adjacent to said abrasive member a clamp on said plate slideably fitted around said standard, a threaded boss on said clamp, a feed screw located adjacent to said column and passing through said boss to raise or lower said plate, and an inclinable work support on said plate.

3. A machine of the kind described, comrising a base, a standard mounted on said ass and secured thereto, an arm secured to the upper end of saidstandard, a rotatable shaft mounted in said base and said arm, anabrasive member secured to said shaft for rotation therewith, means to rotate said shaft, a plate located adjacent to said abrasive member, a clamp on said plate slideably fitted around said standard, a threaded boss on said clamp, a feed screw located adjacent to said column and passing through said boss to raise or lower said plate, a hollow said standard, a threaded boss member on the under side of said plate, said plate having a recess alined with said hollow member, an inclinable work support pivoted in said depending member, and means on said member to retain said work support in adjusted position.

4. A machine of the kind described, coinrising a base, a standard mounted on said ase and secured thereto, an arm secured to the upper end of said standard, a rotatable shaft mounted in said base and said arm, an abrasive member secured to said shaft for rotation therewith, means to rotate said shaft,

a plate located adjacent to said abrasive member, a clamp on said plate slideably fitted around said standar a threaded boss on said clamp, a feed screw located adjacent to said column and passing through said boss to raise or lower said plate, an inclinable work support on said plate, means to retain said work support in adjusted position, and work guiding means on said sup- 5. A machine of the kind described, comrising a base, a standard mounted on said ase and secured thereto, an arm secured to the upper end of said standard, a rotatable shaft mounted in said base and said arm, an abrasive member secured to said shaft for rotation therewith, means to rotate said shaft. a plate located adjacent to said abrasive member, a clam on said plate slideably fitted around sai standard. a threaded boss on said clamp, a feed screw located adjacent to said column and passing through said boss to raise or lower said plate, an inclinable work support on said glate, means to retain said work support in a justed position, work guiding means on said support, and means on said standard to guide said plate during vertical movement.

6. A machine of the kind described, comprisin a base, a vertical standard mounted on said base and secured thereto, an arm secured to the upper end of said standard, a rotatable shaft mounted in said base and said arm, an abrasive member secured to said shaft for rotation therewith, means to oted in said depending member, means on' said member to retain said work support in adjusted position, work guiding means on said support, and a track onsaid standard, said plate having a slot therein cooperating with said track to guide said plate during vertical movement.

7. A machine of the kind described, comprising a base, a vertical standard mounted on said base and secured thereto, an arm secured to the upper end of said standard, a rotatable shaft mounted in said base and said arm, an abrasive member secured to said shaft for rotation therewith, means to rotate said shaft, 9. late having a recess therein and located a jacent to said abrasive member, a hollow member depending from said plate and alined with said recess, an inclinable work support pivoted in said depending member, and means on said memher to retain said work support in adjusted position.

In testimony whereof, I have signed my name to this specification.

LESLIE L. HARTWELL. 

